I'm Shankar Vedantam, the host of a podcast called My Unsung Hero.

Each week we share a short story about an act of kindness that changed someone's life.

She cared enough to say something to me, something that probably wasn't easy to say, but

it was something that changed the direction of my life.

So thank you, Holly.

My Unsung Hero.

Listen and renew your faith in humanity.

Hello, smarty listeners.

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It not only helps us grow the show, but we might also read your review on Who Smarted.

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Psst, hey, smarty pants.

I'm about to go on a trip.

Listen to the following sounds and see if you can guess what kind of vehicle I'll be

traveling in.

Is it A, a car, B, a boat, C, a train, or D, an airplane?

Attention passengers.

Please make sure your seat backs and tray tables are in their full and upright positions

for take-off.

...